Count number of digits in any given number in Java

// count number of given digits
class  NumberOfDigits
{
public static void main( String args[ ] )
{
 int n, c;
 
 n = 1234;
 c = 0;
 while( n != 0 )
 {
  n = n / 10;
  c++;
 }
 System.out.println( " Number of Digits : " + c );
}
}

Output:
Number of Digits : 4